Whether you are crossing the Cascades or staying nearby, the forecast from the National Weather Service forewarns of significant weather events.
Two fronts are expected to cross western Washington beginning Wednesday night, impacting the area through Thursday. A colder second front will arrive Saturday.
If you are staying in Western Washington, be prepared for strong winds during the long holiday weekend. According to a special statement issued this morning by NWS,
these fronts will bring breezy to windy conditions and more rain for The Lowlands. Winds ahead of and along the first front are expected to be strongest along the coast… in the San Juans… and portions of Whatcom and Skagit counties with speeds 20 to 35 mph and gusts to 50 mph. Remaining locations in western Washington will still see wind speeds ranging 15 to 30 mph with possible gusts up to 40 mph.
Seasonal rain is expected in the lowlands during the holiday weekend. More specific timing estimates for the wind events are expected later.
If you are heading east across or into the mountains, be prepared for a total of up to 10 to 15 inches during the holiday weekend. According to the same NWS special statement,
Up to 3 inches of snowfall is possible during the day Thanksgiving day… with up to an additional 6 inches possible through Friday in advance of the second front. Current forecasts suggest that total snowfall amounts for the entire Holiday weekend will range from 10 to 15 inches are possible in the mountain passes.